ike-rekey: Support IKE_SA rekeying with multiple key exchanges
This commit is contained in:
parent
273b4258f1
commit
2f3af8759f
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (C) 2015-2018 Tobias Brunner
|
||||
* Copyright (C) 2015-2020 Tobias Brunner
|
||||
* Copyright (C) 2005-2008 Martin Willi
|
||||
* Copyright (C) 2005 Jan Hutter
|
||||
* HSR Hochschule fuer Technik Rapperswil
|
||||
|
@ -25,7 +25,6 @@
|
|||
#include <processing/jobs/rekey_ike_sa_job.h>
|
||||
#include <processing/jobs/initiate_tasks_job.h>
|
||||
|
||||
|
||||
typedef struct private_ike_rekey_t private_ike_rekey_t;
|
||||
|
||||
/**
|
||||
|
@ -64,14 +63,49 @@ struct private_ike_rekey_t {
|
|||
ike_delete_t *ike_delete;
|
||||
|
||||
/**
|
||||
* colliding task detected by the task manager
|
||||
* Colliding passive task if any
|
||||
*/
|
||||
private_ike_rekey_t *collision;
|
||||
|
||||
/**
|
||||
* TRUE if rekeying can't be handled temporarily
|
||||
* Link value for the current key exchange
|
||||
*/
|
||||
bool failed_temporarily;
|
||||
chunk_t link;
|
||||
|
||||
/**
|
||||
* State/error flags
|
||||
*/
|
||||
enum {
|
||||
|
||||
/**
|
||||
* Set if rekeying can't be handled temporarily.
|
||||
*/
|
||||
IKE_REKEY_FAILED_TEMPORARILY = (1<<0),
|
||||
|
||||
/**
|
||||
* Set if the parsed link value was invalid.
|
||||
*/
|
||||
IKE_REKEY_LINK_INVALID = (1<<1),
|
||||
|
||||
/**
|
||||
* Set if we use multiple key exchanges and already processed the
|
||||
* CREATE_CHILD_SA response and started sending IKE_FOLLOWUP_KEs.
|
||||
*/
|
||||
IKE_REKEY_FOLLOWUP_KE = (1<<2),
|
||||
|
||||
/**
|
||||
* Set if a passive rekeying has completed successfully and we don't
|
||||
* expect any further messages.
|
||||
*/
|
||||
IKE_REKEY_DONE = (1<<3),
|
||||
|
||||
/**
|
||||
* Set if we adopted a completed passive task, otherwise we just
|
||||
* reference it.
|
||||
*/
|
||||
IKE_REKEY_ADOPTED_PASSIVE = (1<<4),
|
||||
|
||||
} flags;
|
||||
};
|
||||
|
||||
/**
|
||||
|
@ -160,10 +194,24 @@ METHOD(task_t, process_i_delete, status_t,
|
|||
return this->ike_delete->task.process(&this->ike_delete->task, message);
|
||||
}
|
||||
|
||||
METHOD(task_t, build_i_multi_ke, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
status_t status;
|
||||
|
||||
charon->bus->set_sa(charon->bus, this->new_sa);
|
||||
message->add_notify(message, FALSE, ADDITIONAL_KEY_EXCHANGE, this->link);
|
||||
status = this->ike_init->task.build(&this->ike_init->task, message);
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
this->flags |= IKE_REKEY_FOLLOWUP_KE;
|
||||
return status;
|
||||
}
|
||||
|
||||
METHOD(task_t, build_i, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
ike_version_t version;
|
||||
status_t status;
|
||||
|
||||
/* create new SA only on first try */
|
||||
if (!this->new_sa)
|
||||
|
@ -187,9 +235,9 @@ METHOD(task_t, build_i, status_t,
|
|||
this->ike_init = ike_init_create(this->new_sa, TRUE, this->ike_sa);
|
||||
this->ike_sa->set_state(this->ike_sa, IKE_REKEYING);
|
||||
}
|
||||
this->ike_init->task.build(&this->ike_init->task, message);
|
||||
|
||||
return NEED_MORE;
|
||||
status = this->ike_init->task.build(&this->ike_init->task, message);
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return status;
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -230,19 +278,110 @@ static bool have_half_open_children(private_ike_rekey_t *this)
|
|||
return FALSE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if we are actively rekeying and optionally, if we already sent an
|
||||
* IKE_FOLLOWUP_KE message.
|
||||
*/
|
||||
static bool actively_rekeying(private_ike_rekey_t *this, bool *follow_up_sent)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
task_t *task;
|
||||
bool found = FALSE;
|
||||
|
||||
enumerator = this->ike_sa->create_task_enumerator(this->ike_sa,
|
||||
TASK_QUEUE_ACTIVE);
|
||||
while (enumerator->enumerate(enumerator, (void**)&task))
|
||||
{
|
||||
if (task->get_type(task) == TASK_IKE_REKEY)
|
||||
{
|
||||
if (follow_up_sent)
|
||||
{
|
||||
private_ike_rekey_t *rekey = (private_ike_rekey_t*)task;
|
||||
*follow_up_sent = rekey->flags & IKE_REKEY_FOLLOWUP_KE;
|
||||
}
|
||||
found = TRUE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
return found;
|
||||
}
|
||||
|
||||
/**
|
||||
* Process payloads in a IKE_FOLLOWUP_KE message or a CREATE_CHILD_SA response
|
||||
*/
|
||||
static void process_link(private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
notify_payload_t *notify;
|
||||
chunk_t link;
|
||||
|
||||
notify = message->get_notify(message, ADDITIONAL_KEY_EXCHANGE);
|
||||
if (!notify)
|
||||
{
|
||||
DBG1(DBG_IKE, "%N notify missing", notify_type_names,
|
||||
ADDITIONAL_KEY_EXCHANGE);
|
||||
this->flags |= IKE_REKEY_LINK_INVALID;
|
||||
}
|
||||
else
|
||||
{
|
||||
link = notify->get_notification_data(notify);
|
||||
if (this->initiator)
|
||||
{
|
||||
chunk_free(&this->link);
|
||||
this->link = chunk_clone(link);
|
||||
}
|
||||
else if (!chunk_equals_const(this->link, link))
|
||||
{
|
||||
DBG1(DBG_IKE, "data in %N notify doesn't match", notify_type_names,
|
||||
ADDITIONAL_KEY_EXCHANGE);
|
||||
this->flags |= IKE_REKEY_LINK_INVALID;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
METHOD(task_t, process_r_multi_ke, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
if (message->get_exchange_type(message) != IKE_FOLLOWUP_KE)
|
||||
{
|
||||
return FAILED;
|
||||
}
|
||||
if (this->ike_sa->get_state(this->ike_sa) == IKE_DELETING)
|
||||
{
|
||||
DBG1(DBG_IKE, "peer continued rekeying, but we are deleting");
|
||||
this->flags |= IKE_REKEY_FAILED_TEMPORARILY;
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
charon->bus->set_sa(charon->bus, this->new_sa);
|
||||
process_link(this, message);
|
||||
this->ike_init->task.process(&this->ike_init->task, message);
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
METHOD(task_t, process_r, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
bool follow_up_sent;
|
||||
|
||||
if (this->ike_sa->get_state(this->ike_sa) == IKE_DELETING)
|
||||
{
|
||||
DBG1(DBG_IKE, "peer initiated rekeying, but we are deleting");
|
||||
this->failed_temporarily = TRUE;
|
||||
this->flags |= IKE_REKEY_FAILED_TEMPORARILY;
|
||||
return NEED_MORE;
|
||||
}
|
||||
if (have_half_open_children(this))
|
||||
{
|
||||
DBG1(DBG_IKE, "peer initiated rekeying, but a child is half-open");
|
||||
this->failed_temporarily = TRUE;
|
||||
this->flags |= IKE_REKEY_FAILED_TEMPORARILY;
|
||||
return NEED_MORE;
|
||||
}
|
||||
if (actively_rekeying(this, &follow_up_sent) && follow_up_sent)
|
||||
{
|
||||
DBG1(DBG_IKE, "peer initiated rekeying, but we did too and already "
|
||||
"sent IKE_FOLLOWUP_KE");
|
||||
this->flags |= IKE_REKEY_FAILED_TEMPORARILY;
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
|
@ -262,11 +401,16 @@ METHOD(task_t, process_r, status_t,
|
|||
METHOD(task_t, build_r, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
if (this->failed_temporarily)
|
||||
if (this->flags & IKE_REKEY_FAILED_TEMPORARILY)
|
||||
{
|
||||
message->add_notify(message, TRUE, TEMPORARY_FAILURE, chunk_empty);
|
||||
return SUCCESS;
|
||||
}
|
||||
if (this->flags & IKE_REKEY_LINK_INVALID)
|
||||
{
|
||||
message->add_notify(message, TRUE, STATE_NOT_FOUND, chunk_empty);
|
||||
return SUCCESS;
|
||||
}
|
||||
if (!this->new_sa)
|
||||
{
|
||||
/* IKE_SA/a CHILD_SA is in an unacceptable state, deny rekeying */
|
||||
|
@ -275,17 +419,43 @@ METHOD(task_t, build_r, status_t,
|
|||
}
|
||||
|
||||
charon->bus->set_sa(charon->bus, this->new_sa);
|
||||
if (this->ike_init->task.build(&this->ike_init->task, message) == FAILED)
|
||||
switch (this->ike_init->task.build(&this->ike_init->task, message))
|
||||
{
|
||||
this->ike_init->task.destroy(&this->ike_init->task);
|
||||
this->ike_init = NULL;
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return SUCCESS;
|
||||
case FAILED:
|
||||
this->ike_init->task.destroy(&this->ike_init->task);
|
||||
this->ike_init = NULL;
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return SUCCESS;
|
||||
case NEED_MORE:
|
||||
/* additional key exchanges, the value in the notify doesn't really
|
||||
* matter to us as we have a window size of 1 */
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
if (!this->link.ptr)
|
||||
{
|
||||
this->link = chunk_clone(chunk_from_chars(0x42));
|
||||
}
|
||||
message->add_notify(message, FALSE, ADDITIONAL_KEY_EXCHANGE,
|
||||
this->link);
|
||||
if (this->ike_sa->get_state(this->ike_sa) != IKE_REKEYING)
|
||||
{
|
||||
this->ike_sa->set_state(this->ike_sa, IKE_REKEYING);
|
||||
}
|
||||
this->public.task.process = _process_r_multi_ke;
|
||||
return NEED_MORE;
|
||||
default:
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
if (this->ike_sa->get_state(this->ike_sa) != IKE_REKEYING)
|
||||
{
|
||||
this->ike_sa->set_state(this->ike_sa, IKE_REKEYING);
|
||||
}
|
||||
break;
|
||||
}
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
|
||||
if (this->ike_sa->get_state(this->ike_sa) != IKE_REKEYING)
|
||||
{ /* in case of a collision we let the initiating task handle this */
|
||||
this->flags |= IKE_REKEY_DONE;
|
||||
|
||||
/* if we are actively rekeying, we let the initiating task handle this */
|
||||
if (!actively_rekeying(this, NULL))
|
||||
{
|
||||
establish_new(this);
|
||||
/* make sure the IKE_SA is gone in case the peer fails to delete it */
|
||||
lib->scheduler->schedule_job(lib->scheduler, (job_t*)
|
||||
|
@ -296,7 +466,7 @@ METHOD(task_t, build_r, status_t,
|
|||
}
|
||||
|
||||
/**
|
||||
* Conclude any undetected rekey collision.
|
||||
* Conclude any (undetected) rekey collision.
|
||||
*
|
||||
* If the peer does not detect the collision it will delete this IKE_SA.
|
||||
* Depending on when our request reaches the peer and we receive the delete
|
||||
|
@ -304,18 +474,174 @@ METHOD(task_t, build_r, status_t,
|
|||
*
|
||||
* Returns TRUE if there was a collision, FALSE otherwise.
|
||||
*/
|
||||
static bool conclude_undetected_collision(private_ike_rekey_t *this)
|
||||
static bool conclude_collision(private_ike_rekey_t *this, bool maybe_undetected)
|
||||
{
|
||||
if (this->collision)
|
||||
if (this->collision &&
|
||||
this->flags & IKE_REKEY_ADOPTED_PASSIVE)
|
||||
{
|
||||
DBG1(DBG_IKE, "peer did not notice IKE_SA rekey collision, abort "
|
||||
"active rekeying");
|
||||
if (maybe_undetected)
|
||||
{
|
||||
DBG1(DBG_IKE, "peer may not have noticed IKE_SA rekey collision, "
|
||||
"abort active rekeying");
|
||||
}
|
||||
establish_new(this->collision);
|
||||
return TRUE;
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Delete the redundant IKE_SA we created.
|
||||
*/
|
||||
static void delete_redundant(private_ike_rekey_t *this)
|
||||
{
|
||||
host_t *host;
|
||||
|
||||
/* apply host for a proper delete */
|
||||
host = this->ike_sa->get_my_host(this->ike_sa);
|
||||
this->new_sa->set_my_host(this->new_sa, host->clone(host));
|
||||
host = this->ike_sa->get_other_host(this->ike_sa);
|
||||
this->new_sa->set_other_host(this->new_sa, host->clone(host));
|
||||
this->new_sa->set_state(this->new_sa, IKE_REKEYED);
|
||||
if (this->new_sa->delete(this->new_sa, FALSE) == DESTROY_ME)
|
||||
{
|
||||
this->new_sa->destroy(this->new_sa);
|
||||
}
|
||||
else
|
||||
{
|
||||
charon->ike_sa_manager->checkin(charon->ike_sa_manager, this->new_sa);
|
||||
}
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
this->new_sa = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check in the redundant IKE_SA created by the peer and wait for its deletion.
|
||||
*/
|
||||
static void wait_for_redundant_delete(private_ike_rekey_t *this)
|
||||
{
|
||||
private_ike_rekey_t *other = this->collision;
|
||||
job_t *job;
|
||||
|
||||
/* peer should delete the SA it created, add a timeout just in case */
|
||||
job = (job_t*)delete_ike_sa_job_create(
|
||||
other->new_sa->get_id(other->new_sa), TRUE);
|
||||
lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
|
||||
other->new_sa->set_state(other->new_sa, IKE_REKEYED);
|
||||
charon->ike_sa_manager->checkin(charon->ike_sa_manager, other->new_sa);
|
||||
other->new_sa = NULL;
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
}
|
||||
|
||||
/**
|
||||
* Remove the passive rekey task that's waiting for IKE_FOLLOWUP_KE requests
|
||||
* that will never come.
|
||||
*/
|
||||
static void remove_passive_rekey_task(private_ike_rekey_t *this)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
task_t *task;
|
||||
|
||||
enumerator = this->ike_sa->create_task_enumerator(this->ike_sa,
|
||||
TASK_QUEUE_PASSIVE);
|
||||
while (enumerator->enumerate(enumerator, &task))
|
||||
{
|
||||
if (task->get_type(task) == TASK_IKE_REKEY)
|
||||
{
|
||||
this->ike_sa->remove_task(this->ike_sa, enumerator);
|
||||
task->destroy(task);
|
||||
break;
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle any collision as necessary and report back if we lost the
|
||||
* collision and should abort the active task.
|
||||
*/
|
||||
static bool collision_lost(private_ike_rekey_t *this, bool multi_ke)
|
||||
{
|
||||
private_ike_rekey_t *other = this->collision;
|
||||
chunk_t this_nonce, other_nonce;
|
||||
|
||||
if (!this->collision)
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
this_nonce = this->ike_init->get_lower_nonce(this->ike_init);
|
||||
other_nonce = other->ike_init->get_lower_nonce(other->ike_init);
|
||||
|
||||
/* the SA with the lowest nonce should be deleted (if already complete),
|
||||
* check if we or the peer created that */
|
||||
if (memcmp(this_nonce.ptr, other_nonce.ptr,
|
||||
min(this_nonce.len, other_nonce.len)) < 0)
|
||||
{
|
||||
if (multi_ke)
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision lost, abort incomplete "
|
||||
"multi-KE rekeying");
|
||||
}
|
||||
else
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision lost, deleting redundant "
|
||||
"IKE_SA %s[%d]", this->new_sa->get_name(this->new_sa),
|
||||
this->new_sa->get_unique_id(this->new_sa));
|
||||
delete_redundant(this);
|
||||
}
|
||||
/* establish the other SA if the passive task is done (i.e. was
|
||||
* single-KE or our response was delayed and the winner continued),
|
||||
* otherwise, we just let it continue independently */
|
||||
conclude_collision(this, FALSE);
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* the passive rekeying is complete only if it was single-KE. otherwise,
|
||||
* the peer would either have stopped before sending IKE_FOLLOWUP_KE when it
|
||||
* noticed it lost, or it responded with TEMPORARY_FAILURE to our
|
||||
* CREATE_CHILD_SA request if it already started sending them.
|
||||
* since the task is not completed immediately, we clean up the collision */
|
||||
if (this->flags & IKE_REKEY_ADOPTED_PASSIVE)
|
||||
{
|
||||
if (multi_ke)
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision won, continue with multi-KE "
|
||||
"rekeying and wait for delete for redundant IKE_SA %s[%d]",
|
||||
other->new_sa->get_name(other->new_sa),
|
||||
other->new_sa->get_unique_id(other->new_sa));
|
||||
}
|
||||
else
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision won, waiting for delete for "
|
||||
"redundant IKE_SA %s[%d]",
|
||||
other->new_sa->get_name(other->new_sa),
|
||||
other->new_sa->get_unique_id(other->new_sa));
|
||||
}
|
||||
wait_for_redundant_delete(this);
|
||||
other->public.task.destroy(&other->public.task);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* the peer will not continue with its multi-KE rekeying, so we must
|
||||
* remove the passive task that's waiting for IKE_FOLLOWUP_KEs */
|
||||
if (multi_ke)
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision won, continue with "
|
||||
"multi-KE rekeying and remove passive %N task",
|
||||
task_type_names, TASK_IKE_REKEY);
|
||||
}
|
||||
else
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision won, remove passive %N task",
|
||||
task_type_names, TASK_IKE_REKEY);
|
||||
}
|
||||
remove_passive_rekey_task(this);
|
||||
}
|
||||
this->collision = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
METHOD(task_t, process_i, status_t,
|
||||
private_ike_rekey_t *this, message_t *message)
|
||||
{
|
||||
|
@ -329,78 +655,66 @@ METHOD(task_t, process_i, status_t,
|
|||
this->ike_sa->get_id(this->ike_sa), TRUE));
|
||||
return SUCCESS;
|
||||
}
|
||||
if (message->get_notify(message, STATE_NOT_FOUND))
|
||||
{
|
||||
DBG1(DBG_IKE, "peer didn't like our %N notify data", notify_type_names,
|
||||
ADDITIONAL_KEY_EXCHANGE);
|
||||
if (!conclude_collision(this, TRUE))
|
||||
{
|
||||
schedule_delayed_rekey(this);
|
||||
}
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
charon->bus->set_sa(charon->bus, this->new_sa);
|
||||
switch (this->ike_init->task.process(&this->ike_init->task, message))
|
||||
{
|
||||
case FAILED:
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
/* rekeying failed, fallback to old SA */
|
||||
if (!conclude_undetected_collision(this))
|
||||
if (!conclude_collision(this, TRUE))
|
||||
{
|
||||
schedule_delayed_rekey(this);
|
||||
}
|
||||
return SUCCESS;
|
||||
case NEED_MORE:
|
||||
/* bad DH group or QSKE mechanism, try again */
|
||||
this->ike_init->task.migrate(&this->ike_init->task, this->new_sa);
|
||||
return NEED_MORE;
|
||||
if (message->get_notify(message, INVALID_KE_PAYLOAD))
|
||||
{ /* bad key exchange mechanism, try again */
|
||||
this->ike_init->task.migrate(&this->ike_init->task,
|
||||
this->new_sa);
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return NEED_MORE;
|
||||
}
|
||||
/* multiple key exchanges, continue with IKE_FOLLOWUP_KE */
|
||||
process_link(this, message);
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
if (this->flags & IKE_REKEY_LINK_INVALID)
|
||||
{ /* we can't continue without notify, maybe the peer returns
|
||||
* one later */
|
||||
if (!conclude_collision(this, TRUE))
|
||||
{
|
||||
schedule_delayed_rekey(this);
|
||||
}
|
||||
return SUCCESS;
|
||||
}
|
||||
this->public.task.build = _build_i_multi_ke;
|
||||
/* there will only be a collision if we process a CREATE_CHILD_SA
|
||||
* response, later we just respond with TEMPORARY_FAILURE and ignore
|
||||
* the passive task */
|
||||
return collision_lost(this, TRUE) ? SUCCESS : NEED_MORE;
|
||||
default:
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
break;
|
||||
}
|
||||
|
||||
if (this->collision)
|
||||
/* there won't be a collision here if this task is for a multi-KE rekeying,
|
||||
* as a collision during CREATE_CHILD_SA was cleaned up above */
|
||||
if (collision_lost(this, FALSE))
|
||||
{
|
||||
private_ike_rekey_t *other = this->collision;
|
||||
host_t *host;
|
||||
chunk_t this_nonce, other_nonce;
|
||||
|
||||
this_nonce = this->ike_init->get_lower_nonce(this->ike_init);
|
||||
other_nonce = other->ike_init->get_lower_nonce(other->ike_init);
|
||||
|
||||
/* the SA with the lowest nonce should be deleted, check if we or
|
||||
* the peer created that */
|
||||
if (memcmp(this_nonce.ptr, other_nonce.ptr,
|
||||
min(this_nonce.len, other_nonce.len)) < 0)
|
||||
{
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision lost, deleting redundant "
|
||||
"IKE_SA %s[%d]", this->new_sa->get_name(this->new_sa),
|
||||
this->new_sa->get_unique_id(this->new_sa));
|
||||
/* apply host for a proper delete */
|
||||
host = this->ike_sa->get_my_host(this->ike_sa);
|
||||
this->new_sa->set_my_host(this->new_sa, host->clone(host));
|
||||
host = this->ike_sa->get_other_host(this->ike_sa);
|
||||
this->new_sa->set_other_host(this->new_sa, host->clone(host));
|
||||
this->new_sa->set_state(this->new_sa, IKE_REKEYED);
|
||||
if (this->new_sa->delete(this->new_sa, FALSE) == DESTROY_ME)
|
||||
{
|
||||
this->new_sa->destroy(this->new_sa);
|
||||
}
|
||||
else
|
||||
{
|
||||
charon->ike_sa_manager->checkin(charon->ike_sa_manager,
|
||||
this->new_sa);
|
||||
}
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
this->new_sa = NULL;
|
||||
establish_new(other);
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/* peer should delete the SA it created, add a timeout just in case */
|
||||
job_t *job = (job_t*)delete_ike_sa_job_create(
|
||||
other->new_sa->get_id(other->new_sa), TRUE);
|
||||
lib->scheduler->schedule_job(lib->scheduler, job,
|
||||
HALF_OPEN_IKE_SA_TIMEOUT);
|
||||
DBG1(DBG_IKE, "IKE_SA rekey collision won, waiting for delete for "
|
||||
"redundant IKE_SA %s[%d]", other->new_sa->get_name(other->new_sa),
|
||||
other->new_sa->get_unique_id(other->new_sa));
|
||||
other->new_sa->set_state(other->new_sa, IKE_REKEYED);
|
||||
charon->ike_sa_manager->checkin(charon->ike_sa_manager, other->new_sa);
|
||||
other->new_sa = NULL;
|
||||
charon->bus->set_sa(charon->bus, this->ike_sa);
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
establish_new(this);
|
||||
|
||||
/* rekeying successful, delete this IKE_SA using a subtask */
|
||||
this->ike_delete = ike_delete_create(this->ike_sa, TRUE);
|
||||
this->public.task.build = _build_i_delete;
|
||||
|
@ -430,7 +744,7 @@ METHOD(ike_rekey_t, collide, bool,
|
|||
switch (other->get_type(other))
|
||||
{
|
||||
case TASK_IKE_DELETE:
|
||||
conclude_undetected_collision(this);
|
||||
conclude_collision(this, TRUE);
|
||||
break;
|
||||
case TASK_IKE_REKEY:
|
||||
{
|
||||
|
@ -440,11 +754,22 @@ METHOD(ike_rekey_t, collide, bool,
|
|||
{
|
||||
DBG1(DBG_IKE, "colliding exchange did not result in an IKE_SA, "
|
||||
"ignore");
|
||||
if (this->collision == rekey)
|
||||
{
|
||||
this->collision = NULL;
|
||||
}
|
||||
break;
|
||||
}
|
||||
DESTROY_IF(&this->collision->public.task);
|
||||
/* we keep track of the passive exchange in any case, if not
|
||||
* complete yet, this method might be called again later */
|
||||
this->collision = rekey;
|
||||
return TRUE;
|
||||
if (rekey->flags & IKE_REKEY_DONE)
|
||||
{
|
||||
this->flags |= IKE_REKEY_ADOPTED_PASSIVE;
|
||||
return TRUE;
|
||||
}
|
||||
DBG1(DBG_IKE, "colliding passive exchange is not yet complete");
|
||||
break;
|
||||
}
|
||||
default:
|
||||
/* shouldn't happen */
|
||||
|
@ -471,7 +796,14 @@ static void cleanup(private_ike_rekey_t *this)
|
|||
cur_sa = charon->bus->get_sa(charon->bus);
|
||||
DESTROY_IF(this->new_sa);
|
||||
charon->bus->set_sa(charon->bus, cur_sa);
|
||||
DESTROY_IF(&this->collision->public.task);
|
||||
/* only destroy if the passive task was adopted, otherwise it is still
|
||||
* queued and might get destroyed by the task manager */
|
||||
if (this->collision &&
|
||||
this->flags & IKE_REKEY_ADOPTED_PASSIVE)
|
||||
{
|
||||
this->collision->public.task.destroy(&this->collision->public.task);
|
||||
}
|
||||
chunk_free(&this->link);
|
||||
}
|
||||
|
||||
METHOD(task_t, migrate, void,
|
||||
|
@ -483,6 +815,7 @@ METHOD(task_t, migrate, void,
|
|||
this->new_sa = NULL;
|
||||
this->ike_init = NULL;
|
||||
this->ike_delete = NULL;
|
||||
this->flags = 0;
|
||||
}
|
||||
|
||||
METHOD(task_t, destroy, void,
|
||||
|
|
Loading…
Reference in New Issue